Android學習之啓動第三方應用程序

方法一：  

        Intent intent = new Intent();

       intent.setAction("com.lzy.example.MAIN");        intent.addCategory("android.intent.category.DEFAULT");        startActivity(intent);

  注：在要啓動的應用程序主入口中添加

​    ​<intent-filter>

       ​<action android:name="com.lzy.example.MAIN" />        ​<category android:name="android.intent.category.LAUNCHER" />     ​</intent-filter>

    

//    ComponentName

方法二：(如果要啓動的Activity不是主Activity，需要在AndroidManifest添加exported=true)

       Intent intent1 = new Intent();
       intent1.setComponent(new ComponentName("com.lzy.example",
               "com.lzy.example.MainActivity"));
       Bundle bundle = new Bundle();
       bundle.putString("abc", "哈哈哈哈哈");
       intent1.putExtras(bundle);

       startActivity(intent1);

/**
 * 判斷相對應的APP是否存在 
 *
 * @param context
 * @param packageName(包名)
 * @return
 */
private boolean isAvilible(Context context, String packageName) throws Exception {
    PackageManager packageManager = context.getPackageManager();

    //獲取手機系統的所有APP包名，然後進行一一比較  
    List<PackageInfo> pinfo = packageManager.getInstalledPackages(0);
    for (int i = 0; i < pinfo.size(); i++) {
        if (((PackageInfo) pinfo.get(i)).packageName.equalsIgnoreCase(packageName))
            return true;
    }
    return false;
}

/**
 * 判斷我們的手機中是否存在我們要的這個action
 *
 * @param context
 * @param action
 * @return
 */
private boolean isActionSupport(Context context,String action){
    final PackageManager packageManager = context.getPackageManager();
    final Intent intent = new Intent(action);
    List<ResolveInfo> resolveInfo =
            packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
    if (resolveInfo.size() > 0) {
        return true;
    }
    return false;
}